Peculiarities of Dispersion Strengthening of V–Cr–W–Zr–(C, O, N) Alloy by ZrC Nanoparticles under Conditions of Phase Instability of Crystalline Lattice

The influence of dispersion strengthening on the temperature dependence of the yield strength of the V–Cr–W–ZrC alloy was investigated in temperature intervals with different tendencies toward a dislocation-free mode of homogeneous deformation associated with BCC → HCP → BCC Bain-type transformations. The role of this deformation mode and of dislocation mechanisms of plastic flow in determining the strength (high-temperature strength) and low-temperature ductility of vanadium alloys is discussed.